the products available these days are endless, what combinations to use can be a mystery. Since you are using 3-part by GH, why not stick with GH supplements for now, at least you can count on them all being compatible.

If you plan to use distilled or RO water, It is recomended you supplement with Cal-Mag. Most experienced hydro growers around here all use it. Good clean and clear filtered water lacks a bit of what Cal-mag puts back in.

I use Silca Blast because of the high temps I have in my cabinet at times. If you run temps around 90 degr. and up, Silica Blast is recomended, along with CO2 to compete with the heat.

I know I already mentioned Hygrozyme, it especially helps if you have small pots to grow in (like ebb and flow grow pots), or little root space to grow in.

My combination of nutes will be my recipe for a long time. It has brought me great success. Stable pH, consistant growth, maximum effeciency, no surprises.